Dúvida em um código Flutter

Mobile
#1

Porque a frase: Hi from MyStatefulWidge não é impressa no Device e sim no Console ?

import 'package:flutter/material.dart';

void main(){
  runApp(
    MyStatefulWidget()
  );
  }
  class MyStatefulWidget extends StatefulWidget{
  @override
    _MyStatefulWidgetState createState()=> _MyStatefulWidgetState();}
    class _MyStatefulWidgetState extends State<MyStatefulWidget>{
  var myColor = Colors.red;
  changeColor(){
    setState(() {
      myColor = Colors.blue;
    });
  }
  @override
      Widget build(BuildContext context){
    return MaterialApp(
        home: Container(
        color: myColor,
        child: Center(
        child: RaisedButton(
          child: Text("Click", textDirection: TextDirection.ltr,),
          onPressed:(){
            print("Hi from MyStatefulWidget");
            changeColor();
          }
        ),
      ),
    ),
    );
}
}